JP5044109B2 - Damping floor structure - Google Patents

Description

  The present invention relates to a vibration-damping floor structure for suppressing vibrations transmitted to beams, joists and the like that support a floor board.

  A floor structure of a building structure such as a general house is generally configured by supporting a floor board with a framework member such as a frame or a beam. When an impact associated with walking or work is applied to the floor board, vibration is generated, which causes unpleasant noise or unpleasant vibration. Especially in detached houses and condominiums that use metal members as beams, vibrations and impact sounds generated on floorboards in living rooms and corridors are directly propagated downstairs, causing great discomfort to downstairs residents. It can also be a cause.

Therefore, in recent years, attempts have been made to suppress vibrations applied to the floor board by providing a vibration-proofing material and a sound insulating material between the floor board on the upper floor and the ceiling on the lower floor, thereby improving the comfortability. Has been made.

  The damping material, for example, absorbs vibration energy due to impact vibration applied to the floor plate and converts it into thermal energy, thereby suppressing resonance amplification of the natural vibration system, increasing the distance attenuation of vibration propagation, or a diffusion vibration plate, etc. It is a material that prevents energy storage. The sound insulating material is a material for receiving sound waves propagating in the air and minimizing the acoustic output of the sound waves emitted from the back surface of the sound insulating material. The “damping material” described below is defined as a material having both functions of vibration damping and sound insulation.

  As a vibration damping material that can effectively reduce the vibration of the floor board, for example, a sound insulating floor as shown in Patent Document 1 has been conventionally devised. For example, as shown in FIG. 19, the sound insulating floor 111 is configured by fixing a floor surface material 115 to the upper surface of a molded cement panel 113 with a tapping screw 117 and arranging a plurality of hollow portions 119 in the molded cement panel 113. Is done.

  The hollow portion 119 in the molded cement panel 113 is filled with an aggregate 121 of sand-like particles such as dredged sand, and the aggregate 121 is free to move in the hollow portion 119 by vibration energy applied to the molded cement panel 113. It is possible.

  When an object falls on such a sound insulation floor 111 or a person jumps, an impact based on this propagates to the molded cement panel 113 through the floor surface material 115. As a result, the molded cement panel 113 vibrates, and in response to this, particles of the aggregate 121 of sand-like particles filled in the hollow portion 119 vibrate, and one vibration energy that vibrates the molded cement panel 113 is obtained. The part is absorbed as energy for vibrating the particles of the aggregate 121. That is, the impact propagating to the molded cement panel 113 is mitigated by absorbing the energy, and as a result, the sound insulation to the lower floor side can be improved.

  Further, as another example of the damping material, for example, a damping panel as shown in Patent Document 2 has been proposed. For example, as shown in FIG. 20, the vibration control panel 130 forms a cell space 134 by partitioning a space portion between two opposing plate members 131 and 132 with a partition plate 133, and the cell space 134 has hysteresis. An elastic granular material 135 having elastic deformability is enclosed.

  In this conventional vibration control panel 130, vibrations in a low frequency band can be absorbed by converting vibration energy into heat energy by friction of the elastic granular material 135 due to elastic vibration. Further, with respect to vibration in the middle frequency band, absorption of vibration energy can be further promoted by collision between the elastic powder particles 135. Further, for vibration in a high frequency band, absorption of vibration energy can be promoted by a collision based on the jumping of the elastic granular material 135.

  As another example of the vibration damping material, for example, a floor structure 141 as shown in Patent Document 3 has been proposed. In this floor structure 141, as shown in FIG. 21, a beam member 143 is joined to a floor plate 144, and an inner surface and an outer surface are coated with rubber in a hollow portion 151 formed inside the beam member 143. A body bag 152 is inserted. The bag body 152 is filled with powder particles 153. This floor structure 141 can also exhibit vibration damping (soundproofing) characteristics based on the same mechanism.

In addition, based on the concept of increasing the surface density by filling the double-wall intermediate air layer with powder particles and improving the sound insulation performance, a technology that provides sound insulation properties to partitions that partition office spaces such as offices Has also been proposed (see, for example, Patent Document 4). In such a technique, the main member of the highly sound-insulating partition is configured as a main member by a panel having a hollow structure, and the surface density is increased by injecting converter-blown slag into the hollow structure. The air-pulverized slag injected here has a particle size of 3.00 mm or less, and has an angle of repose of 12 to 16 ° and excellent fluidity. Therefore, injection from the upper part of the partition and discharge from the lower part are easily performed. be able to.
JP-A-10-205043 JP-A-11-217891 JP 2002-115363 A JP-A-8-177141

However, the vibration damping material disclosed in the above-mentioned patent document has a problem in that it cannot effectively exhibit the sound insulation performance and the vibration damping performance because the bulk specific gravity of the granular material used is low. That is, in order to further improve the vibration damping performance and the like, it is necessary to make the bulk density of the granular material used for the vibration damping material heavier than before and to about 2.0 t / m ³ . Furthermore, when the bulk density of the granular material is increased in weight, there is a need to realize this at a low cost.

  Moreover, since the damping material disclosed in Patent Documents 1 to 3 described above cannot be said to be excellent in the fluidity of the granular material used, in order to accurately fill the desired local region. You have to spend a lot of work on it. In particular, when filling a damping material with a granular material with poor fluidity, it is not possible to use a filling method using air blow or the like, or a filling method using a self-leveling effect, so work efficiency is improved. There was a problem that it was not possible.

  In particular, the powder and granule shown in Patent Document 3 does not jump in its entirety inside the hollow portion, the upper part jumps and exhibits a damping effect, and the remaining part hardly jumps, and the weight impact sound Acts as a weight for reduction. Therefore, the vibration damping effect is not exhibited according to the filling amount, and there is room for improvement in that a further vibration damping effect is exhibited.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to optimize the material of the granular material so that the granular material can be obtained even in a desired local region. The vibration-damping floor structure that can be filled easily and can improve the work efficiency, as well as the reduction of floor vibration caused by walking by improving the vibration-damping performance, as well as lightweight impact sound and weight shock An object of the present invention is to provide a more effective vibration control floor structure with respect to sound suppression.

  In order to solve the above-described problems, the present inventor has found a configuration in which a converter fluidized slag having a high fluidity as shown in Patent Document 4 is injected into a beam supporting a floor board. In order to inject it into the beams supported by the floorboard, it is necessary to further improve the workability in the field, so the angle of repose needs to be made smaller.

That is, the vibration-damping floor structure according to the present invention is a vibration-damping floor structure composed of at least a floor and a beam. Inside the beam, a hollow space into which the powder particles are inserted is formed. , CaO, comprises SiO _2, and Ri Do from the angle of repose of 0 ° ~10 °, SiO ₂ is formed by deposition on the surface.

The vibration-damping floor structure according to the present invention includes a floor structure including at least a floor plate and a beam supporting the floor plate, and a filling member disposed on the floor structure, and the filling member is inserted with a granular material. the hollow space is formed with, granular material is, Fe, CaO, comprises SiO _2, and Ri Do from the angle of repose of 0 ° ~10 °, SiO ₂ is formed by deposition on the surface.

In the vibration-damping floor structure according to the present invention, in the vibration-damping floor structure for suppressing the vibration of the beam supporting the floor plate, a hollow space in which the granular material is enclosed to a predetermined height is formed inside the beam. Further, this granular material contains Fe and CaO, SiO ₂ is deposited on the surface, and has an angle of repose of 0 ° to 10 °.

  Thereby, in the damping floor structure which concerns on this invention, since the fluidity | liquidity of a granular material can be made high, it becomes possible to improve the filling ease with respect to a hollow space. Moreover, in the vibration-damping floor structure to which the present invention is applied, the vibration damping performance can be improved, and as a result, the lightweight impact sound can be effectively insulated.

  Further, in the vibration-damping floor structure according to the present invention, in addition to the above-described configuration, a plurality of joists crossing the beam are provided on the beam, the floor board is attached on the joists, and the beam and An elastic member or a viscoelastic member is interposed between the floor boards.

  Thereby, in the vibration-damping floor structure according to the present invention, in addition to the above-described effects, it is possible to effectively insulate the weight impact sound.

Furthermore, in the vibration-damping floor structure according to the present invention, in the vibration-damping floor structure for suppressing the vibration of the beam supporting the floor plate, a hollow space in which the granular material is enclosed to a predetermined height is provided inside the beam. In addition, this granular material contains Fe, CaO, and SiO ₂ .

Thereby, in the vibration-damping floor structure according to the present invention, it becomes possible to increase the bulk density of the granular material to about 2.0 t / m ³ which is heavier than before, so that the vibration damping performance and the sound insulation performance are improved. In addition, since the molten metal can be used as the granular material, the manufacturing cost can be reduced.

  Hereinafter, as a best mode for carrying out the present invention, a vibration-damping floor structure for suppressing vibration transmitted to a beam supporting a floor board will be described in detail with reference to the drawings.

  FIG. 1A is a perspective view showing an assembled state of the damping floor structure 1 to which the present invention is applied, and FIG. 1B shows a cross-sectional view of the damping floor structure 1.

  The damping floor structure 1 includes a floor plate 11 and a beam 12 that supports the floor plate 11. Further, in this vibration damping floor structure 1, a hollow space 13 is formed inside the beam 12, and a granular material 14 is enclosed in the hollow space 13.

  The floor board 11 is used, for example, in a building structure of a general house. As shown in FIG. 1 (a), an end portion is placed on the upper surface of the beam 12, and a screw or the like (not shown) is further screwed. Fixed and configured. When an impact associated with walking or work is applied to the floor plate 11, vibration is generated and the vibration is also propagated to the beam 12.

  The beam 12 plays a role as a framework member of a building structure. For example, when applied to a wooden building, a wooden beam member having a rectangular cross section may be used, or a reinforcing bar such as an apartment. When applied to a building, a square steel pipe or an H-shaped steel material may be used. In the following description, a case where a rectangular steel pipe having a rectangular cross section is applied as the beam 12 will be described as an example. In addition, when applying a wooden beam member or an H-shaped steel material as the beam 12, an external filling member is disposed in these without forming a hollow space inside the beam 12, Details thereof will be described later.

  In the present embodiment, the hollow space 13 is supposed to be a closed space, but is not limited to this, and an opening for injecting or discharging the granular material 14 is provided. Alternatively, a vent (not shown) for ventilating may be provided. The granular material 14 is inserted into the hollow space 13 up to a predetermined height, and a boundary line 14a between the inserted granular material 14 and the hollow portion is based on a self-leveling effect described later. And approximately horizontal.

Granules 14 include Fe, CaO, and SiO _2. Fe is contained so as to optimize the specific gravity of the granular material. CaO is added in order to suppress the expansion of the powder 14 over time. Furthermore, SiO ₂ is added to improve fluidity.

As an example of this granular material 14, you may make it utilize what is called a crushed slag produced | generated in a steelmaking process. This crushed slag is obtained by granulating molten slag with a high-speed air stream. Because it disperses and flies into microdroplets by high-speed airflow, it becomes spherical due to its self-surface tension, and its surface becomes glassy and clean by gas cooling. In addition, the crushed slag as the granular material 14 contains Fe and CaO, and SiO ₂ is deposited on the surface. In this case, the components of the granular material 14, CaO is less 50 wt%, Fe is 15 wt% or more, SiO ₂ may be composed of 9 wt% or more of the ingredients.

  Moreover, as an example of this granular material 14, you may make it utilize a molten metal, for example. This molten metal is, for example, discharged from a direct melting furnace for waste disposal. In the direct melting furnace for waste disposal, the incineration ash of garbage is melted in a reducing atmosphere in a closed melting furnace. Generally, incineration ash is melted in the melting furnace and separated into molten slag and molten metal. The separated molten metal is taken out and used as the granular material 14.

The granular material 14 to which the molten metal is applied has a metal content of 85 wt% to 90 wt%, a slag content of 15 wt% to 10 wt% (excluding moisture), and contains 80 wt% or more of Fe relative to the total weight of the metal content. In addition, CaO is contained in an amount of 30 wt% to 40 wt% and SiO ₂ is contained in an amount of 30 wt% to 40 wt% with respect to the total weight of the slag.

FIG. 2 shows an example of a metal component and a slag component constituting the molten metal. The molten metal constituted by such a component ratio is constituted by 3.0 to 4.0 t / m ³ per bulk specific gravity. Moreover, the granular material 14 to which this molten metal is applied has a particle size in the range of 0.1 to 13 mm, and the average particle size is 3 to 4 mm. Furthermore, the granular material 14 to which this molten metal is applied has an angle of repose of about 35 °. In addition, the metal part and slag part in a molten metal are not the meaning limited to the range of the component shown in this FIG.

  Hereinafter, the case where the pulverized slag is used as the granular material 14 will be described as an example.

FIG. 3 shows a particle size distribution curve of the crushed slag as the granular material 14. As shown in FIG. 3, for example, by pulverizing glass-added molten slag, the granular material 14 has a particle size in a range of approximately 0.05 mm to 5.00 mm. Incidentally, the average particle diameter calculated from the particle size distribution curve of the crushed slag shown in FIG. 3 is 1.02 mm.

Note that the crushed slag as the granular material 14 having the above-described components and particle sizes has a true density of 2.5 t / m ³ or more, a bulk density of 1.5 t / m ³ , and an angle of repose. The water absorption is represented by a physical property value of 1.5% or less.

  That is, this granular material 14 exhibits the following physical properties by being composed of the crushed slag composed of the above-described components and physical properties.

First, the fluidity can be improved by precipitating SiO ₂ on the surface and curing the surface. As a result, the repose angle can be controlled in the range of 0 ° to 12 °, and the repose angle can be as close to 0 ° as possible. As a result, after filling the granular material 14 into the hollow space 13, it is possible to improve the action (self-leveling effect) in which the boundary line 14a automatically becomes horizontal.

  This angle of repose is measured by general actual measurement of a mountain, and refers to the maximum inclination angle at which the surface is stable without collapsing when a granular material is deposited. The lower the angle of repose, the better the fluidity. When the shape of the granular material is made into a sphere and the slip of the surface is improved, a highly fluid granular material with an angle of repose of 0 to 12 ° is obtained. Since this highly fluid granular material flows not only in the upper part but also in the inside by vibration, the loss associated with the flow increases and the vibration damping performance is greatly improved.

  Further, by controlling the CaO contained in the granular material 14 to 50 wt% or less, it is possible to suppress the expansion and the like over time.

  The mass of the granular material 14 is determined according to the content of Fe in the granular material 14. Further, the specific gravity of the granular material 14 is determined from the relationship between the mass and the particle size of the granular material 14. That is, it is possible to optimize the specific gravity of the granular material 14 by adjusting the Fe content and the particle size in the granular material 14.

  Next, a method for filling the powder body 14 having the above-described configuration into the hollow space 13 provided in the beam 12 will be described.

  In this filling method, first, as shown in FIG. 4, the beam 12 having the lid 18b inserted from the end portion 12b is arranged obliquely, and then the granular material 14 is poured from the end portion 12a. The lid 18a is inserted from the portion 12a to be filled and sealed. Next, the beam 12 filled with the granular material 14 is arranged substantially horizontally and then rocked in the direction A in FIG. 4, or around the member axis extending in the longitudinal direction (direction B in FIG. 4). Rotate. As a result, the granular material 14 is automatically leveled based on the self-leveling effect that it has.

  As described above, the pulverized slag has a small repose angle of 12 ° or less and high fluidity. Therefore, by using the crushed slag as the granular material 14, the crushed slag can be leveled by a relatively simple operation inside the beam 12. can do. Moreover, since the fluidity of the granular material 14 is high, the granular material 14 can be smoothly poured from the end 12a of the beam 12 to the end 12b. As a result, it becomes possible to remarkably improve the ease of filling the granular material 14.

  In FIG. 4, the example in which the granular material 14 is poured from the end 12a while the beam 12 is disposed obliquely has been described. However, the present invention is not limited to this example, and the longitudinal direction of the beam 12 is substantially omitted. It may be arranged so as to be in the vertical direction and the granular material 14 may be poured in, or the longitudinal direction of the beam 12 may be arranged in a substantially horizontal direction and the granular material 14 may be poured in. In any case, it is possible to improve the ease of filling based on the high fluidity of the granular material 14.

  Further, in the vibration-damping floor structure 1 to which the present invention is applied, not only when the granular material 14 is injected into the beam 12 during assembly work in a factory or the like in advance, but also with respect to the beam 12 that is already under construction. Even when 14 is injected, the working efficiency can be improved.

  For example, as shown in FIG. 5 (a), in a state where the beam 12 is already fixed on the building structure and the metal or plastic lids 17a and 17b are inserted from both ends, the upper surface of the beam 12 is predetermined. A plurality of openings 16 are provided at a pitch of Next, a certain amount of the granular material 14 is inserted into the hollow space 13 from each opening 16 by a hose (not shown). Since the granular material 14 filled in the hollow space 13 of the beam 12 has a small angle of repose and high fluidity, as shown in FIG. 5B, it is leveled over time based on the self-leveling effect. It will be. At this time, the self-leveling effect can be promoted by artificially applying wind pressure or the like to the powder particles 14 filled in the hollow space 13.

  Moreover, in the damping floor structure 1 to which this invention is applied, the granular material 14 can be filled with sufficient precision also to a desired local area | region.

  For example, as shown in FIG. 6, when filling the granular material 14 only around the central portion of the beam 12, a material for dividing the closed space into the hollow space 13, such as foam heat insulating materials 20 a and 20 b. Is inserted in advance. This can be realized by inserting a certain amount of the granular material 14 through the opening 16 into the hollow space 13 surrounded by the foam heat insulating materials 20a and 20b. Especially for building structures, in addition to improving vibration damping, there are cases where it is necessary to focus on lightweight impact sounds and to isolate them with high accuracy. It can be said that it is effective for the beam 12.

  In the vibration-damping floor structure 1 in which the hollow space 13 of the beam 12 is filled with the granular material 14 based on the above-described method, for example, vibration energy due to impact vibration applied to the floor plate 11 is propagated to the beam 12. When vibration energy is transmitted to the beam 12, the beam 12 itself vibrates, and accordingly, the powder 14 filled in the hollow space 13 vibrates. As a result, part of the vibration energy for vibrating the beam 12 is absorbed as energy for vibrating the granular material 14. In other words, the absorption of such energy reduces the vibration acting on the beam 12 and thus the floor plate 11, thereby suppressing the vibration transmitted to the lower floor side.

  For example, even when a sound wave is transmitted through the air, vibration energy based on vibration due to the sound wave is absorbed through vibration in the hollow space 13 of the granular material 14, and as a result, to the lower floor side. It is possible to insulate transmitted voice and the like.

  In particular, in the damping floor structure 1 to which the present invention is applied, by using the pulverized slag having an average particle diameter of 1 mm as the granular material 14, the granular material 14 vibrates with respect to relatively small vibrations. Lightweight impact sounds represented by spoon falling sounds and chair dragging sounds can be more effectively insulated.

  In particular, for the purpose of suppressing the vibration of the beam 12 mounted on the building structure, the case where the granular material 14 is injected in the course of construction as shown in FIGS. In many cases, it is necessary to improve the work efficiency by increasing the fluidity of the granular material 14 in the above-described vibration-damping floor structure 1. This can be realized by adjusting the angle of repose within the range of 0 ° to 12 °.

  Furthermore, since the granular material 14 is controlled to have a CaO content of 50 wt% or less, the preservability of the granular material 14 can be improved by suppressing the expansion of the granular material 14 over time. It is also possible to improve the reliability of the vibration damping characteristic itself in the floor structure 1.

  In particular, by adjusting the particle size of the above-described granular material 14 to 3.0 mm or less, the spherical shape is uniform and the surface state is improved. For the molten slag used as a raw material, steel slag (blast furnace slag, steelmaking slag (converter slag, electric furnace slag, etc.)) having a high specific gravity and available in large quantities is suitably used. Crushed slag having a particle size of 3.0 mm or less using the slag has an angle of repose of 0 to 5 °, excellent fluidity, and relatively high specific gravity.

  As such a granular material 14, a crushed slag classified to a particle size of 0.6 mm or less is more preferably used. Pulverized slag does not form extremely small particles due to its production method, and the lower limit of the particle size is about 0.1 mm. Such finely crushed slag can be classified by a sieve having a predetermined roughness. When fine particles such as a particle size of 0.1 to 0.6 mm are gathered, the whole shows properties similar to a high specific gravity fluid, a large flow is caused by vibration, and vibration damping performance is further improved.

  Moreover, the loss factor in 50Hz 1/3 octave band (44.5-56Hz) was investigated regarding the granular material 14. FIG.

  Specifically, the beam 12 is formed of a shape having a width of 40 mm, a height of 235 mm, and a plate thickness of 1.0 mm, and a high fluidity granular material of 15.6 kg / m (space filling factor 80%) is formed in the hollow portion. The loss coefficient η in a 50 Hz 1/3 octave band (44.5 to 56 Hz) was examined. For comparison, the loss coefficient η of the reduced pellets filled at the same ratio was also examined.

  The high-fluidity granular material used was air-pulverized slag, which was classified into particles having a particle size of 3 mm or less at the air-pulverization stage, and thereafter, air-pulverized slag was used without being sized. When the angle of repose was measured for this crushed slag, it was 3 °.

  The reducing pellets used for comparison were fired in a rotary kiln, and the shape was not a perfect sphere, but a round shape, and the particle size was distributed in the range of 9 to 16 mm. The angle of repose for this reduced pellet was measured and found to be 25 °.

  FIG. 7 shows a result of measuring the loss coefficient η with respect to the excitation acceleration (G) in the 50 Hz 1/3 octave band (44.5 to 56 Hz) of the crushed slag and the reduced pellet.

Here, the loss coefficient (η) is an index for evaluating the damping performance of a damping material such as a viscoelastic body. The granular material 14 is filled in the hollow space 13 of the beam 12 and the floor structure is hit and excited. From the resonance peak in the frequency response curve of the driving point mobility (driving speed V / exciting force F) obtained by the following equation (1).
η = Δf / f ₀ (1)

Here, Δf is obtained from the following expression (2), where f1 and f2 (Hz) are frequencies at a point 3 dB lower than the resonance point. Note that f ₀ is the frequency of the resonance point (see FIG. 11).
Δf = f ₂ −f ₁ (2)

  According to FIG. 7, the crushed slag having an angle of repose of 3 ° has a large loss factor η over a wide range where the excitation acceleration (G) is 1.0 or more as compared with the reduced pellet having an angle of repose of 25 °. It can be seen that it is high. In the case of the reduced pellet, only a part of the upper part jumps, whereas in the crushed slag, the jumping part is very wide. It was found that this phenomenon appears remarkably when the angle of repose is 10 ° or less. It was also found that this phenomenon occurs stably when the angle of repose is 0 to 5 °.

  Next, the results of investigating the relationship between the amount of powdered slag and the particle size are shown in FIGS. As shown in the figure, the crushed slag of FIG. 8 is 14% by weight of particles of 3 mm or less and more than 2 mm, 56% by weight of particles of 2 mm or less and more than 1 mm, and 20% by weight of particles of 1 mm or less and more than 0.6 mm. 10% by weight of grains of 6 mm or less are contained.

  The air-pulverized slag in FIG. 9 is classified into particles of 1 mm or less and more than 0.6 mm.

The crushed slag in FIG. 10 is classified into particles of 0.6 mm or less.
In any case, the filling amount is 15.6 kg / m (the space filling rate is about 80%), the filling amount is 11.7 kg / m (the space filling rate is about 60%), and the filling amount is 7.5 kg / m (the space filling rate). About 40%).

  First, as to the influence of the particle size, the loss coefficient η is hardly changed both in the case of FIG. Although not shown in the figure, when the classification is performed to 3 mm or less and more than 2 mm, the loss coefficient η is hardly changed even when the classification is performed to 2 mm or less and more than 1 mm. From these facts, it can be seen that in the case of the pulverized slag, when the particle size is 3 mm or less and fine particles such as 1 mm or less are included, an improvement in loss factor, that is, damping performance can be expected.

  According to FIG. 10, what is classified to 0.6 mm or less (the lower limit is about 0.1 mm from the limit in the production of the crushed slag) is compared with those classified to 3 mm or less, 1 mm or less and more than 0.6 mm. Further, the loss coefficient η is further improved. It can be seen that the loss factor, that is, the vibration damping performance is further improved by arranging fine particles of 0.6 mm or less.

  Further, it is propagated to the beam 12 by finely adjusting the height of the powder 14 filled in the hollow space 13 or by adjusting the particle size of the powder 14 filled in the hollow space 13. The vibration absorption characteristics may be changed. In such a case, among the generated crushed slag, only the crushed slag having a desired particle size is selectively extracted and configured as the powder 14.

  In addition, this invention is not limited to the structure which inject | pours the granular material 14 into the inside of the beam 12 as mentioned above, You may apply to the damping floor structure 2 demonstrated below. In the vibration damping floor structure 2, the same components and members as those of the vibration damping floor structure 1 described above are denoted by the same reference numerals, and the description thereof is omitted here.

  FIG. 12A is a side view of the vibration damping floor structure 2, and is a view showing a cross section taken along the line CC ′ in FIG. As shown in FIGS. 12A and 12B, the damping floor structure 2 includes a floor plate 11 and a beam 12 that supports the floor plate 11. Further, in this vibration damping floor structure 2, an external filling member 21 is disposed with respect to the beam 12, and a hollow space 22 in which the powder particles 14 are injected is formed inside the filling member 21. The filling member 21 is fixed to the side surface of the beam 12 by a fixing bracket 23 such as a screw or a screw.

  The filling member 21 is a container that is finished in a substantially rectangular shape by bending a metal thin-walled material, and a hollow space 22 that can be filled with the granular material 14 is formed therein. Moreover, the granular material 14 is enclosed in this hollow space 22 until it reaches a predetermined height. The material of the filling member 21 is not limited to steel, and may be composed of any other material including plastic.

  In the vibration-damping floor structure 2 having such a configuration, the hollow space 22 formed in the filling member 21 can be easily filled with the granular material 14 having excellent fluidity, so that the work efficiency in the field is improved. This makes it possible to significantly reduce the labor and cost associated with filling.

Even when the granular material 14 is filled in the external filling member 21 with respect to the beam 12 as in the vibration-damping floor structure 2 without filling the beam 12, according to the vibration of the beam 12. The filling member 21 will vibrate in the same manner, and further, the granular material 14 filled therein can be vibrated. As a result, part of the vibration energy for vibrating the beam 12 is absorbed as energy for vibrating the granular material 14, and vibration transmitted to the lower floor side can be suppressed.

  Incidentally, the arrangement position of the filling member 21 is not limited to the side surface of the beam 12, and when there is a beam 12, a floor 11, or a joist of the floor structure, it may be arranged at any place of the joist. In the case of a floor structure in which the floor is a panel, the floor may be disposed on this.

  Moreover, you may apply this invention to the damping floor structure 3 provided with the multiple joist which cross | intersects a beam. In the vibration damping floor structure 3, the same components and members as those of the above-described vibration damping floor structure 1 are denoted by the same reference numerals and description thereof is omitted here.

  For example, as shown in FIG. 13, the vibration-damping floor structure 3 includes a plurality of joists 33 that intersect with a beam 39 as an H-shaped steel, and the floor plate 11 is attached to the joists 33. ing. In the vibration damping floor structure 3, fixing brackets 31 for connecting the ends of the joists 33 are provided on the beam 39 at predetermined intervals, and a hollow space 73 is formed inside the joists 33, and the hollow spaces 73 are formed. A granular material 14 is encapsulated.

  The joist 33 plays a role as a framework member of the building structure in the same manner as the beam 39. The joists 33 are configured to be bonded to the floor plate 11 in parallel, for example, and then joined with a drill screw or the like (not shown), and further to bridge between the beams 39. When an impact associated with walking or work is applied to the floor plate 11, vibration is generated. The vibration is first propagated to the joist 33 and further propagated to the beam 39 through the joist 33.

  In the hollow space 73, the granular material 14 is enclosed up to a predetermined height, and the granular material is leveled based on the self-leveling effect.

  For example, as shown in FIGS. 14 and 15, the fixture 31 is formed by bending a thin steel plate so as to have a U-shaped cross section, and through holes 51 are formed on both side surfaces. Further, a vibration absorbing material 61 is fitted into the through hole 51 of the fixing bracket 31, and a vibration absorbing material 52 is interposed between the inner bottom surface 31 a and the joist 33 in the fixing bracket 31. Further, in order to support the end portion of the joist 33, the fastening screw 45 is inserted into the joist 33 while passing through the vibration absorbing material 61. For example, as shown in FIG. 15A, the fixing bracket 31 is fixed by a bolt 55 and a nut 56 through a through hole 54 provided in the beam 39 when the beam 39 is made of an H-type steel material. Will be.

  The vibration absorbers 52 and 61 are made of, for example, a urethane rubber member, but may be replaced with any other elastic member, or may be replaced with a viscoelastic member. The vibration absorbing material 52 can absorb the impact vibration propagated from the floor board 11 through the joist 33, and similarly absorbs the impact vibration generated on the floor board 11 located immediately above the fixing bracket 31. be able to. In other words, by providing this vibration absorbing material 52, it is possible to absorb the vibration propagating to the fixing bracket 31 at a stretch and to greatly attenuate the vibration transmitted to the beam 39. If the vibration propagating to the beam 39 can be reduced, the solid propagation sound propagating to the lower floor via the beam 39 can be reduced. In addition to the above-described improvement of the vibration damping property, the falling sound of heavy objects, etc. It is possible to effectively insulate light weight impact sounds represented by weight impact sounds represented by (1), spoon falling sounds, chair drag sounds, and the like.

  Similarly, the vibration absorber 61 can absorb the vibration transmitted to the joists 33, can promote the sound insulation effect by the vibration absorber 52, and can also be applied to the joists 33 in the horizontal direction based on an earthquake or the like. Even when vibration is applied, this can be efficiently absorbed. In addition, it may be installed between the joist 33 and the floor in place of the vibration absorbing materials 52 and 61 shown in FIG.

  That is, in this vibration damping floor structure 3, the light impact sound can be insulated by vibrating the granular material 14 as described above, and the vibration absorbers 52 and 61 are provided for the heavy impact sound. Thus, it is possible to effectively insulate this. The vibration damping floor structure 3 is effective in that it can be sound-insulated based on different mechanisms by being disposed in a building structure that can generate both light and heavy impact sounds.

  The damping floor structure 3 is not limited to the embodiment described above. For example, as shown in FIG. 16, the vibration absorbing material 61 may be directly interposed between the beam 39 and the joist 33 intersecting with the beam 39 by omitting the fixing bracket 31. In such a configuration, the vibration absorbing member 61 may be fixed to the beam 39 by, for example, a fixing hardware 81 bent in an S shape. That is, in the configuration shown in FIG. 16, even when the configuration of the fixing bracket 31 is omitted, the weight impact sound can be similarly absorbed, and the cost and labor for preparing the fixing bracket 31 are eliminated. It is effective in that it can be done. 16 may be provided between the joist 33 and the floor or between the joist 33 and the beam 39 instead of the position of the vibration absorbing material 61 shown in FIG.

  Also in the above-described vibration damping floor structure 3, instead of injecting the powder 14 into the hollow space provided inside the joist 33, an external filling member 76 is provided on the side surfaces of the beam 39 and joist 33. It is possible to arrange and inject the granular material 14 into the filling member 76.

  FIG. 17A is a front view of a configuration in which the filling member 76a is disposed on the side surface of the joist 33, and FIG. 17B shows a cross-sectional view taken along line AA ′. The filling member 76a is shaped to have a quadrangular prism shape, and is disposed so that the longitudinal direction thereof coincides with the direction in which the beam 39 and the joist 33 extend.

  The height of the filling member 76a is adjusted so as to be substantially the same as the height of the beam 39 and the joist 33, and may be disposed on both side surfaces of the joist 33, or on either side surface. It may be arranged. Further, the filling member 76a may be formed so as to taper toward the tip as shown in FIG. 17 (a), for example.

  FIG. 18A is a front view of a configuration in which the longitudinal direction of the filling member 76b is arranged so as to be perpendicular to the joist 33, and FIG. 18B shows a cross-sectional view thereof. In this configuration, the filling member 76b is disposed so as to connect the joists 33 to each other.

  Also in the vibration damping floor structure 3, the filling member 76 is provided in accordance with the vibration propagated to the joist 33 through the floor plate 11 by providing the external filling member 76 as in the vibration damping floor structure 2. Since it can be vibrated and furthermore, the granular material 14 filled in the inside can be vibrated, as a result, the damping property can be improved, and particularly a light impact sound as well as a heavy impact sound. Sound insulation is possible.

  When the elastic modulus is remarkably different between the beam 39 and the joist 33, the arrangement position of the filling member 76 may be determined based on the difference in elastic modulus.

  For example, as shown in FIG. 19, in the beam 39 and the joist 33 that are orthogonal to each other, when an impact is directly applied to the floor plate 11 on the joist 33 that is fastened immediately above the beam 39, the beam 39 takes charge of vibration associated with the impact. become. As a result, the beam 39 vibrates more intensely than the joist 33.

  Therefore, by arranging the filling member 76 along the beam 39 as shown in FIG. 19, it is possible to directly absorb the impact propagated to the beam 39 and to attenuate the vibration of the beam 39. It becomes.

In addition, in the damping floor structures 1-3 to which this invention is applied, it is not limited to the case where it is arrange | positioned in a building structure, It may be arrange | positioned in anything, such as a ship and a vehicle. Of course.
Incidentally, in the example mentioned above, when using a molten metal as the granular material 14, since it can comprise by 3.0-4.0t / m < ³ > about the bulk specific gravity, vibration damping performance, sound insulation Since the performance can be improved and the molten metal can be used as the granular material, the production cost can be reduced.

It is a figure which shows the structure of the damping floor structure to which this invention is applied. It is a figure shown about the component of the molten metal as a granular material. It is a figure for demonstrating about the particle size distribution of the crushed slag as a granular material. It is a figure for demonstrating about the method of filling a hollow body provided in the inside of a beam with a granular material. It is another figure for demonstrating about the method of filling a hollow body provided in the inside of a beam with a granular material. It is a figure for demonstrating about the method of filling a desired local area | region in the beam 12 with a granular material. It is a graph which shows the damping performance of a wind crushing slag. It is a graph which shows the damping performance of a wind crushing slag. It is a graph which shows the damping performance of a wind crushing slag. It is a graph which shows the damping performance of a wind crushing slag. It is a figure for demonstrating per frequency of a resonance point. It is a block diagram of the damping floor structure which attaches the filling member with which the granular material was filled to a beam. It is a perspective view of a damping floor structure provided with a plurality of joists crossing a beam. It is a perspective view of the fixing metal fitting provided between a beam and joists. It is sectional drawing and side view of a fixing metal fitting provided between a beam and joists. It is a figure shown about the example in which a vibration-absorbing material is directly interposed between a beam and a joist crossing this. It is a figure shown about the structure which arrange | positions an external filling member with respect to the side surface of a beam or joist, and inject | pours a granular material into this filling member. It is a figure for demonstrating about the other example of arrangement | positioning of a filling member. It is a figure for demonstrating about the example which arrange | positions a filling member in the floor structure which consists of a beam and a joist which have mutually different elastic moduli. It is a figure for demonstrating about the structure of the sound insulation floor proposed in the past. It is a figure for demonstrating about the structure of the damping floor conventionally proposed. It is a figure for demonstrating about the structure of the floor structure proposed conventionally.

Explanation of symbols

1, 2, 3 Damping floor structure 11 Floor plate 12, 25 Beam 13, 22, 73 Hollow space 14 Powder body 16 Opening portion 17a, 17b Lid 18a, 18b Caulking 20a, 20b Foaming heat insulating material 21, 76 Filling member 23 , 31 fixing bracket 33 joist 51 through hole 52, 61 vibration absorber 55 bolt 56 nut

Claims (6)

In the vibration-damping floor structure consisting of at least the floor and beams,
In the inside of the beam, a hollow space into which the powder is inserted is formed,
The granular body, Fe, CaO, comprises SiO _2, and Ri Do from the angle of repose of 0 ° to 10 °, damping floor structure SiO ₂ is characterized by comprising been deposited on the surface. A floor structure comprising at least a floor plate and a beam supporting the floor board, and a filling member disposed on the floor structure,
The filling member is formed with a hollow space into which the granular material is inserted,
The granular body, Fe, CaO, comprises SiO _2, and Ri Do from the angle of repose of 0 ° to 10 °, damping floor structure SiO ₂ is characterized by comprising been deposited on the surface. The granular body, CaO is less 50 wt%, Fe is 15 wt% or more, wherein the SiO ₂ is from 9 wt% or more of the components, further characterized in that it is constituted by a particle size of 0.05mm~5.00mm Item 3. A damping floor structure according to item 1 or 2 . The vibration-damping floor structure according to any one of claims 1 to 3 , wherein the granular material is a crushed slag. A plurality of joists crossing the beam are provided on the beam, and the floor board is attached on the joists,
Further, an elastic member or a viscoelastic member is interposed between the beam and the floor plate, The vibration-damping floor structure according to any one of claims 1 to 4 . A fixing bracket for connecting the ends of a plurality of joists crossing the beam is provided on the beam, and the floor board is attached on the joists,
Further, an elastic member or a viscoelastic member is interposed between the floor plate and the joist. The vibration-damping floor structure according to any one of claims 1 to 5 .

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